带逐段常变量微分方程的伪概周期解

利用伪概周期函数唯一分解性质,研究相关差分方程的伪概周期序列解,并以此为工具得出一类带逐段常变量微分方程伪概周期解的存在唯一性.     

一类具有逐段常变量微分方程的渐近概周期解

利用差分方程的渐近概周期序列解，讨论了一类具有逐段常变量微分方程的渐近概周期解的存在性．     

二阶中立型逐段常变量微分方程概周期解的存在性

通过构造差分方程的概周期序列解,研究了二阶中立型逐段常变量微分方程 d²/dt²(x(t)+px(t-1))=qx(2[t+1/2])+g(t,x(t),x([t]))概周期解的存在性.     

逐段常变量微分方程组概周期型解存在唯一性

通过差分方程指数二分法,我们研究了一类具有变系数逐段常变量微分方程组概周期与伪概周期解的存在唯一性与渐近稳定性,改进了已有文献的结果,并且得到了差分方程满足指数二分性的一个充分条件．     

具逐段常变量中立型时滞微分方程的概周期解

通过构造二阶差分方程的概周期序列解，研究了中立型时滞逐段常变量微分方程概周期解的存在性．     

带逐段常变量的二阶中立型延迟微分方程的概周期解

本文讨论了带逐段常变量的二阶中立型延迟微分方程(x(t)+px(t-1))″=qx(2[(t+1)/2])+f(t)的概周期解的存在性,此处[.]表示取整函数,p,q是非零实数,|p|=1,q≠-4,f(t)是一个概周期函数.     

一类具有逐段常变量神经网络系统概周期解存在性与指数稳定性

利用Halanay不等式,我们得到了一类具有逐段常变量神经网络系统解全局指数稳定的一个充分条件;此外,在同样条件下,通过不动点定理,证明了这类概周期系统概周期解的存在唯一性与模包含关系．     

一类具有逐段常变量微分方程正周期解存在惟一性

利用全连续算子的特征值与α-凹(凸)算子理论,得到了一类具有逐段常变量微分方程正周期解存在性、惟—性及其对参数连续依赖的充分条件．     

带逐段常变量[t+1/2]的微分方程组的伪概周期解

利用伪概周期向量序列这一新的概念, 研究了带有逐段常变量[t+1/2]的微分方程组的伪概周期解的存在惟一性和其他解的无界性, 考虑了特征方程有重根的情形     

Almost Periodic Solutions of Neutral Differential Difference Equations with Piecewise Constant Arguments

In this paper, we study the existence of almost periodic solutions of neutral differential difference equations with piecewise constant arguments via difference equation methods. Received February 18, 2000, Accepted September 30, 2000.     

The Existence of Almost Periodic Solutions of Second Order Neutral Differential Equations with Piecewise Constant Argument

51.Intr0ducti0nInthispaper,weconsidertheexistenceofalmostperiodicsoluti0nsforthefoll0wingneutralfunctionaldifferentialebuationwithpiecewiseconstantargument:wherep,qarenonzeroconstants,p(t)lsanalmostper1odicfunctlon,g:RXRXR-Risanalm0stperiodicfunctionintanduniformlyonRXR,andL.jstandsforthegreatest-integerfunction.Notethatforanyintegern,if2n-10)andtheequations(1),(2)areadvanced(orretardedrespectively).Differentialequationswithpiecewiseconstantar…     

具分段常数变元的脉冲微分方程周期解的存在性

通过构造差分方程的周期数列解，研究了一类具有分段常数变元的脉冲微分方程周期解的存在性．     

一类时滞反应扩散方程的周期解和概周期解

通过构造上、下控制函数，结合上、下解方法及相应的单调迭代方法研究了一类时滞反应扩散方程，证明了在反应项非单调时，如果一雏边值问题存在一对周期（或概周期）上、下解，则方程一定存在唯一的周期（或概周期）解．并给出了二维边值问题周期（或概周期）解存在唯一性的充分条件．推广了已有的一些结果。     

Almost periodic solutions of second-order neutral equations with piecewise constant arguments

In this paper, we present a theorem on the almost periodic solutions of second-order neutral equations with piecewise constant arguments of the form

(x(t)+px(t−1))^″=qx([t])+f(t),${(x\left(t\right)+px(t-1))}^{″}=qx\left(\left[t\right]\right)+f\left(t\right)\text{,}$

Pseudo Almost Periodic Solutions of a Singularly Perturbed Differential Equation with Piecewise Constant Argument

Under suitable assumptions, the existence and the uniqueness of the pseudo-almost periodic solution for a singularly perturbed differential equation with piecewise constant argument are obtained. In addition, the stability properties of these solutions are characterized by the construction of manifolds of initial data.     

A New Almost Periodic Type Solution of First Order Neutral Delay Differential Equations with Piecewise Constant Argument

In this paper, we introduce a new class of ergodic sequences, pseudo almost periodic sequences, and study the existence of pseudo almost periodic sequences to difference equations. On the basis of these, we investigate the existence of pseudo almost periodic solutions for neutral delay differential equations with piecewise constant argument, Received September 21, 1998, Accepted July 6, 1999     

一类非齐次时滞微分方程概周期解的存在性

该文研究一类非齐次时滞微分方程的概周期解，结合运用指数二分法，给出了系统存在概周期解的一组充分条件．